php – Codeigniter分页不显示第一行查询结果

2019-07-10 01:31:41 阅读：142 来源： 互联网

标签：php limit pagination codeigniter offset

如您所见,我正在查询数据库中的问题列表.

我的模型返回一个问题计数(count_questions())以及问题本身(get_questions($args)),然后对它们进行分页.

    $limit  = '10';
    $count  = $this->forum_model->count_questions();
    $offset    = $this->uri->segment(3, 0);

    $this->load->library('pagination');

    $config['base_url']         = base_url() . 'forum/all/';
    $config['total_rows']       = $count;
    $config['per_page']         = $limit;
    $config['full_tag_open']    = '<div class="pagination">';
    $config['full_tag_close']   = '</div>';
    $config['uri_segment']          = 3;

    $this->pagination->initialize($config);

    $data['q']          = $this->forum_model->get_questions(NULL, $limit, $offset);

    $data['pag_links']  = $this->pagination->create_links();

我看到的奇怪行为是count_questions()返回’25′(这是正确的).

但分页输出显示24个问题,跳过我数据库中的第一行/问题.

起初我认为这可能是因为错误的偏移,但在第一页中设置为0.

如果我不使用分页,我的控制器会输出所有25个问题.因此,似乎有一些我正在做的分页限制/偏移可能是罪魁祸首.

任何想法在这里可能是错的？

谢谢你的帮助.

模型(get_questions)

function get_questions($forum_qa_id = NULL, $limit = NULL, $offset = NULL)
{
    ($forum_qa_id === NULL) ? ($forum_qa_id = "'%'") : ($forum_qa_id = $forum_qa_id);
    ($limit       === NULL) ? ($limit = 1) : ($limit = $limit);
    ($offset      === NULL) ? ($offset = 0) : ($offset = $offset);

    $query = $this->db->query("
    SELECT forum_qa.*,
           user_profiles.*,
           c.*,
           n.pid,
           v.*,
           Ifnull(n.ans_count, 0) AS ans_count
    FROM   forum_qa
           JOIN user_profiles
             ON user_id = forum_qa_author_id
           LEFT JOIN (SELECT *
                      FROM   votes) AS v
             ON forum_qa_id = v.forum_qa_id_fk
           LEFT JOIN (SELECT forum_cm_id,
                             forum_cm_author_id,
                             forum_qa_id_fk,
                             forum_cm_text,
                             forum_cm_timestamp,
                             forum_cm_flag,
                             first_name  AS forum_cm_first_name,
                             last_name   AS forum_cm_last_name,
                             facebook_id AS forum_cm_fb_id,
                             picture     AS forum_cm_picture,
                             moderator   AS forum_cm_moderator
                      FROM   forum_cm
                             JOIN user_profiles
                               ON user_id = forum_cm_author_id) AS c
             ON forum_qa_id = c.forum_qa_id_fk
           LEFT JOIN (SELECT forum_qa_parent_id AS pid,
                             COUNT(*)           AS ans_count
                      FROM   forum_qa
                      WHERE  forum_qa_parent_id IS NOT NULL
                      GROUP  BY forum_qa_parent_id) AS n
             ON forum_qa_id = n.pid
    WHERE  forum_qa_id LIKE $forum_qa_id
           AND forum_qa_parent_id IS NULL
    ORDER  BY forum_qa_timestamp DESC
    LIMIT  $limit
    OFFSET $offset;     
    ");

型号(count_questions)

function count_questions()
{
    $query = $this->db->query("
    SELECT  *
    FROM    forum_qa
    WHERE   forum_qa_type = 1;
    ");

    return $query->num_rows;
}

解决方法:

return $query-> num_rows;应该返回$query-> num_rows();.

另外,尝试将LIMIT $limit OFFSET $offset更改为LIMIT $offset,$limit.

标签：php,limit,pagination,codeigniter,offset
来源： https://codeday.me/bug/20190710/1418709.html

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php – Codeigniter分页不显示第一行查询结果